Rotary compressor



B. B. FARNHAM.

ROTARY COMPRESSER.

APPLICATION FILED APR. 9,1919. 1,35%,035. PatentedSept. 28, 1920.

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Bron B. EARNHAM, or KENMORE, NEW YORK.

ROTARY COMPRESSOR.

Specification of Letters Patent. Patented Sept. 28,1920.

Application filed April 9, 1919. Serial No. 288,698.

Te all whom it may concern:

Be it known that I, Bron B. FARNHAM, a

citizen of the United States, residing at Kenmore, in the county 'of Erie and State of New York, have invented a new and useful.

RotaryCompressor, of which the following is a specification.

This invention relates toimprovements in rotary compressors, the object of the invention being to provide an improvedcompres sor or pump in Which a vacuum is created by means of centrifugal force acting on a body of water.

Generally stated, it is the object of the present invention to provide a device of the character set forth which is comparatively In the drawings accompanying and forming part of this specification,

Figure 1 is a side elevation of my improved pump, with the head or cover broken away to more clearly illustrate the interior construction Fig. 2 is a cross section taken on the line '2 2 of Fig. 1;

Fig. 3 is an end view of the pump and Fig. 4 isa side view, on a very. much reduced scale, of the side opposite the side drical in cross section and having formed.

thereon an extension 3 concentric with the axis of the housing, whereby is formed a main chamber 4 and an auxiliary chamber 5. lVithin the main chamber is placed a bushing member 6 that extends around the major portion of the circumference of said chamher, but is cut away at the portion'thereof adjacent to the auxiliary chamber 5. This bushing is slidable within the main chamber, therebyto limit the size of the communicating passageway between the main and auxiliary chambers. In one side of the housing is fitted a disk-shaped heador cover -7 provided centrally thereof with an opening forming a bearing for a driving shaft 8, shown broken away, the head being held in position in the end of the housing by means of a ring member 9 secured by means of screws to the wall of the housing, as shown in Fig. 2. Secured'on the end of the shaft 8 within the main chamber of the housing is a rotary impeller, which consists in the present instance of a disk 10 and an annulus 11, each of a diameter sufficient to permit it to rotate freely within the bushing 6, the disk and annulus being connected together by a plurality ofcurved blades 12 extending radially of the main chamber a distance corresponding to the width of the annulus,

thereby forming a circular opening between the inner ends of said blades. A plate 13 is provided within said opening for dividing it into a pair of compartments or chambers 14, 15, and for the purpose ofpermitting.

the location of such chambers to be changed with relation to the auxiliary .chamber 5 the plate 13 is mounted on a bolt 16 having a bearing in the side wall of the housing and screw threaded at its outer end, whereby a nut 17 may besecured thereon to holdthe plate 13 in any position to which 1t may be adjusted.

From the construction described it will be seen that the chambers 14 and 15 are placed in communication respectively with the upper and lowerportionsof the auxiliary chamber 5 by means of the ports formed between the blades of the impeller. -At the side of .the housing opposite the head 7, an air intake port 18 is-provided, in communication with t-he chamber 14, the purpose of which will be hereinafter described, while the chamber 15 is provided with an extension 19 in communication by means of an .external passageway or duct 20 with the auxiliary-chamber 5 somewhat below the middle of the height of the latter. The auxiliary chamber 5 is provided,-preferably at theupper end thereof, with an air outlet port 21, and slightly below the middle of its height with a water intake port 22. A plurality of battle plates 23 are'provided within the auxiliary chamber opposite the opening of the air outlet port 2-1, for a purpose pres ently to be set forth.

The operation of the device is as follows: The air outlet port 21 is connected by any mitted to run into the auxiliary chamber 5 until it rises somewhat higher than the adjustable division plate 13. The water supply is then shut off. Motion toward the left of Fig. l is imparted to the shaft 8 from any convenient source of power, the impeller be ing thereby rotated, whereupon the blades 12 that were lo -ated below the chamber 15 carry with them the water that has flowed down from such chamber. \Vhen these blades arrive at the upper or first quadrant of the. cycle of rotation the water is retained between them by means of centrifugal action thereon, and this water is carried over into the second quadrant, where the ports between the blades are in communication with the auxiliary chamber 5, whereupon the centrifugal.force causes the water between the blades to be discharged into said auxiliary chamber, a rush of airs from the chamber ll following the water.

through the ports between the blades, this air being carried into the auxiliary chamber 5 and forced out through the air outlet port 21 by reason of the accumulation of water in the lower part of the auxiliary chamber. A vacuum is thus created in the chamber 14, whereupon air rushes in through the port 18. Fig. 1 illustrates diagrammatically the course followed by the air after entering the chamber 14:. The bafile plates 23 prevent any appreciablequantity of water from being ejected through the outlet 21 along with the air. The water returned to the auxiliary chamber 5 passes to the lower chamber 15 through the external duct 20.

'hile I have described in detail the structure herein illustrated,- it is to be understood that'I do not thereby limit my invention to the precise features of construction shown, as I am aware that many mechanical changes may be made therein without departing from the spirit and scope of the invention as pointed out in the appended claim.

Having thus described my invention, What I claim is:

A rotary compressor, comprising a housing forming a main chamber and an auxiliary chamber in communiation with each other, said main chamber being divided into an upper and a lower chamber, an air intake port .connnunicating with said upper chamber. an air outlet port communicating with said auxiliary chamber, adjustable means for changing-the location of said upper and lower chambers with relation to the auxiliary chamber, means for supplying water to said auxiliary chamber, an overflow duct connecting the auxiliary chamber with said lower chamber, an impeller including a pair of members connected together by a plurality ofcurred blades extending radially of the main chamber and having ducts therebetween adapted to communicate with said upper and lower chambers, said ducts being adapted to receive water when in connnunication with the lower chamber, means for rotating said impeller thereby to forcibly eject the water therefrom into the auxiliary chamber during the communication of its duets with the upper chamber, and battles within the auxiliary chamber 0pposite the air outlet port.

In testimony that I claim the foregoing as my own. I have hereto afiixed my signature in the presence of two witnesses.

' BIO) B. FARNHAM.

\Vitnesses:

'FRAXK J. Bon'rnn, HELEN J. BN0. 

